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Car traffic took a big dip beginning in late March, and headlines celebrated clean air around the U.S. But an NPR analysis of EPA data tells a more troubling story.

Federal regulators have increased the number of vehicles to be recalled because of defective air bags made by Takata Corp. An additional 35 to 40 million air bag inflators will need to be replaced.

After years of frustration over air pollution, a petroleum refinery in Colorado agreed to a settlement. Nearby residents are spending some of that money to set up air monitors around the plant.

"Direct air capture" is a technically challenging and controversial strategy for softening the blow of global warming that backers say will be a necessity to meet global emissions targets in the years ahead.

The parent company of Alaska Airlines and Horizon Air announced strong earnings for the first quarter of the year on Friday.

A possible local air authority, first mentioned last month, is now part of discussions with officials outside Multnomah County.

As Canada and parts of the U.S. confront declines in air quality due to smoke from Canadian wildfires, NPR reporters in Asia, Latin America and Africa share their experiences.

Transportation Secretary Sean Duffy wants air travelers to be nice this holiday season. A new DOT campaign asks passengers to help each other and thank flight attendants.

Delta Air Lines CEO Richard Anderson said his company wants to nearly double its footprint at Seattle-Tacoma International Airport.

Environmentalists are concerned about a draft air permit that has been released for a proposed oil terminal in Vancouver.